63963261 has 24 divisors (see below), whose sum is σ = 96744960. Its totient is φ = 40672800.

The previous prime is 63963227. The next prime is 63963281. The reversal of 63963261 is 16236936.

63963261 is a `hidden beast` number, since 6 + 396 + 3 + 261 = 666.

It is not a de Polignac number, because 63963261 - 2¹⁰ = 63962237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63963281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18195 + ... + 21423.

It is an arithmetic number, because the mean of its divisors is an integer number (4031040).

Almost surely, 2^63963261 is an apocalyptic number.

It is an amenable number.

63963261 is a deficient number, since it is larger than the sum of its proper divisors (32781699).

63963261 is a wasteful number, since it uses less digits than its factorization.

63963261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3337 (or 3334 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 63963261 is about 7997.7034828756. The cubic root of 63963261 is about 399.9234457662.

The spelling of 63963261 in words is "sixty-three million, nine hundred sixty-three thousand, two hundred sixty-one".